A 1480 kg car is moving along a horizontal surface with a speed of 27.4 m/s. What work (J) must be done by the brakes to bring this car to rest in 5.78 seconds?
A 1480 kg car is moving along a horizontal surface with a speed of 27.4 m/s....
A 1100-kg car moving on a horizontal surface has speed v = 50 km/h when it strikes a horizontal coiled spring and is brought to rest in a distance of 2.3 m . What is the spring stiffness constant of the spring?
A 280-kg flatcar 22 m long is moving with a speed of 6.0 m/s along horizontal frictionless rails. A 95-kg worker starts walking from one end of the car to the other in the direction of motion, with speed 2.5 m/s with respect to the car. In the time it takes for him to reach the other end, how far has the flatcar moved?
In the figure, a 5.00-kg block is moving at 5 m/s along a horizontal frictionless surface toward an ideal massless spring that is attached to a wall. After the block collides with the spring, the spring is compressed a maximum distance of 0.68 m. What is the speed of the block in m/s when it has moved so that the spring is compressed to a distance of 0.495 m? 5.00 kg 5.00 m/s
A 1.50 kg book is sliding along a rough horizontal surface. At point A it is moving at 3.21 m/s , and at point B it has slowed to 1.25 m/s . a.How much work was done on the book between A and B? b.If -0.750 of work is done on the book from B to C, how fast is it moving at point C? in m/s c. How fast would it be moving at C if 0.750 J of...
A 1100-kg car moving on a horizontal surface has speed v = 50 km/h when it strikes a horizontal coiled spring and is brought to rest in a distance of 2.7 m What is the spring stiffness constant of the spring? Express your answer to two significant figures and include the appropriate units.
A 5.0-kg object is pulled along a horizontal surface at a constant speed by an 11.5 N force acting 30degree above the horizontal. How much work is done by this force as the object moves 7.4 m? 78 j 82 J 85 J 74 J 43 j A trunk is pulled by a constant horizontal force of 12 N at an angle of 15degree above the horizontal. The work done by the applied force after the trunk has move 4.15...
A boxed 10.0-kg computer monitor is dragged by friction 5.50 m up along the moving surface of a conveyor belt inclined at an angle 34.9o above the horizontal. If the monitor’s speed is 2.10 m/s, how much work is done on the monitor by friction?
A mass m = 12 kg is pulled along a horizontal floor with NO friction for a distance d =6.5 m. Then the mass is pulled up an incline that makes an angle θ = 25° with the horizontal and has a coefficient of kinetic friction μk = 0.44. The entire time the massless rope used to pull the block is pulled parallel to the incline at an angle of θ = 25° (thus on the incline it is parallel...
A mass m = 17 kg is pulled along a horizontal floor with NO friction for a distance d =6 m. Then the mass is pulled up an incline that makes an angle θ = 37° with the horizontal and has a coefficient of kinetic friction μk = 0.4. The entire time the massless rope used to pull the block is pulled parallel to the incline at an angle of θ = 37° (thus on the incline it is parallel...
Question 5.2a: A 1350-kg car is traveling with an initial speed of 26.0 m/s. Determine the car's speed after ?2.15 ? 105 J of net work is done on the car. m/s Question 5.2b: A 11.6-kg box is sliding across a horizontal floor. It has an initial speed of 1.40 m/s and the only force acting on it is kinetic friction with magnitude fk = 3.00 N. Determine the distance the box will travel before coming to rest. m